This is honestly essential to fully utilizing the 4100 saw I'm not sure why they couldn't just hook it up to the saw. So I bought it. There is no doubt. To sum up my installation experience: I spent 10 minutes assembling and an hour trying to get this damn thing to move smoothly without sticking. Too many variables. You have two tubes on the bottom of the saw (slotted) that should be perfectly parallel. GREAT. Otherwise the foils will stick together. I'm a mechanical engineer from a good school and have a busy workshop with good lighting and the right tools for the job. It shouldn't be that hard, Bosch. Aside from the PITA that emerged on this setup, it's a solid build and I'm sure I'll get plenty from it. But it still connects. I think I'll throw up the WD-40. Hey Bosch, did I mention IT SHOULD NOT BE THAT HARD?
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